Abstract
The design and concept of a new integrating sphere for absolute diffuse reflectance measurement are presented, together with an evaluation of the reflectance non-uniformity. The new integrating sphere was designed with emphasis on uniform reflectance over the sphere wall. SpectralonTM was employed as the inner material for the sphere wall. The integrating sphere with geodesic design was developed for the most appropriate specifications to realize the high reflectance uniformity. The evaluation of the reflectance non-uniformity of the sphere wall in the visible region revealed that the geodesic integrating sphere had a quite uniform reflectance with non-uniformity of about 0.16% on the average.
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